router: skip warning when configured lifetime is 0 #210
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The configured lifetime is overridden to be 0 in certain cases where advertising a positive lifetime is not sensible. A log warning is only warranted if the user was not already aware of this condition and erroneously set the lifetime to a positive value. If the user acknowledges these conditions by manually configuring a 0 lifetime, we should not warn them of the override.
rpigott
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| @@ -638,7 +638,7 @@ static int send_router_advert(struct interface *iface, const struct in6_addr *fr | |||
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| if (default_route && valid_prefix) { | |||
| adv.h.nd_ra_router_lifetime = htons(lifetime < UINT16_MAX ? lifetime : UINT16_MAX); | |||
| } else { | |||
| } else if (lifetime) { | |||
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Doesn't this change the logic flow here? The first if is only entered if both default_route && valid_prefix evaluate to true. The second else is always entered in all other cases. With this change, it is now only entered if lifetime is true.
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Yes? That is the point of this patch. Can you clarify what is the issue?
I'm trying to remove this superfluous warning about overriding the ra_lifetime to 0. If the lifetime is already 0, there is no need to override it, and certainly no need to warn about overriding it.
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What about the 'other' cases?
Before change: if a and b... else everything else end if
After change: if a and b... else if c... end if.
everything else is no longer handled. You might be right, I just haven't evaluated what everything else might be here.
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Well the else block only does the override and the warning. If we don't want to do these things (because lifetime is already 0) I reckon there is nothing more to do.
The configured lifetime is overridden to be 0 in certain cases where advertising a positive lifetime is not sensible. A log warning is only warranted if the user was not already aware of this condition and erroneously set the lifetime to a positive value.
If the user acknowledges these conditions by manually configuring a 0 lifetime, we should not warn them of the override.